EP0282440B1 - Electrodeposited grindstone - Google Patents
Electrodeposited grindstone Download PDFInfo
- Publication number
- EP0282440B1 EP0282440B1 EP88730056A EP88730056A EP0282440B1 EP 0282440 B1 EP0282440 B1 EP 0282440B1 EP 88730056 A EP88730056 A EP 88730056A EP 88730056 A EP88730056 A EP 88730056A EP 0282440 B1 EP0282440 B1 EP 0282440B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nickel
- grindstone
- electrodeposited
- layer
- abrasive grains
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/14—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings
- B24D3/16—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic ceramic, i.e. vitrified bondings for close-grained structure, i.e. of high density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0018—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by electrolytic deposition
Definitions
- the present invention relates to an electrodeposited grindstone which serves as an abrasive tool.
- a grindstone which serves as an abrasive tool is formed by letting a surface 1a of a grinding part of a base metal 1 of the grindstone bear abrasive grains 2 such as cubic system boron nitride (CBN) and diamond, with a nickel plated bearing layer as a binder.
- a conventional electrodeposited grindstone is manufactured by forming a nickel plated bearing layer 4 which bears abrasive grains 2 by electrodepositing abrasive grains that are suspended in a nickel plating solution, after forming a thin nickel plated layer 3 by electrodeposition on a grinding part surface 1a of a grindstone base metal 1.
- Such a conventional electrodeposited grindstone has a nickel plated bearing layer 4 for bearing abrasive grains 2 whose thickness tends to be nonuniform depending upon the form of the surface 1a of the grinding part or the grain size and the condition of distribution in the plating solution of the abrasive grains 2, and further, the hardness of the nickel plated layer itself is not-sufficiently large, so that its endurance life is desirous of to be improved a little bit.
- US-A-41 55 721 relates to the use of nickel plating in manufacturing an electrodeposited grindstone.
- the abrasive grains to be used for the electrodeposited grindstone of the present invention are hard abrasive grains such as cubic system boron nitride abrasive grains and diamond abrasive grains, but other hard abrasive grains can also be employed. These abrasive grains have a size which is the same as the conventional one.
- a grindstone which employs cubic system boron nitride is used principally for grinding of iron family metals while a grindstone which employs diamond abrasive grains is used principally for grinding nonferrous metals.
- FIG. 1 is a sectional view which shows the bearing condition of abrasive grains in an electrodeposited grindstone in accordance with the present invention.
- FIG. 2 is a diagram which shows the bearing condition of abrasive grains in a conventional electrodeposited grindstone.
- FIG. 3 is an external view of an example of abrasive grindstone
- FIG. 4 is a sectional view of an example of abrasive grindstone.
- FIG. 5 is a sectional view which shows the bearing condition of abrasive grains in an electrodeposited grindstone for another embodiment of the present invention.
- FIG. 6 is a sectional view which shows the bearing condition of abrasive grains in still another embodiment of the present invention
- FIG. 7 is a perspective view with a partial omission of the case in which the present invention is applied not to an electrodeposited grindstone but to a gear type shaving tool.
- FIG. 1 is shown an example of embedding of abrasive grains in an electrodeposited grindstone of the present invention.
- a nickel plated coating 3 with thickness of 4 ⁇ m is given by electrodeposition process on the surface 1a of a grinding part of the base metal 1 of a grindstone.
- a nickel plated bearing layer 4 of average thickness of 10 ⁇ m which bears abrasive grains 2 is formed by carrying out an electrodeposition in a nickel plating solution which contains cubic system boron nitride (CBN) abrasive grains of #325/400 suspended in it.
- CBN cubic system boron nitride
- An electrodeposited grindstone of the present invention thus produced is divided into four parts of which three parts were given a heat treatment by heating them at 150, 250, and 400°C, respectively.
- the hardnesses of the heat treated nickel-phosphorus alloy plated bearing layers 5 were all above Hv 800. The remaining one part was not given a heat treatment.
- the electrodeposited grindstone which was not given a heat treatment and those that were given a heat treatment at respective temperatures were subjected to a grinding test to be compared with an electrodeposited grindstone with an electrodeposited nickel plated bearing layer 4 of average thickness of 30 ⁇ m produced by the conventional method.
- the result of the test showed that the endurance life of the electrodeposited grindstones of the present invention was 1.5 times for the specimen which was not given a heat treatment and was 2 - 2.5 times for the heat treated specimens, of the corresponding life of the conventional electrodeposited grindstone.
- FIG. 5 is shown another embodiment of the present invention.
- a nickel plated coating 13 of thickness 4 ⁇ m by electrodeposition process on a grinding part surface 11a of a grindstone base metal 11 a nickel-phosphorus alloy plated coating 14 of thickness 20 ⁇ m was carried out by chemical plating process.
- a nickel plated bearing layer 15 of average thickness 10 ⁇ m which bears abrasive grains 12a was formed by electrodeposition in a nickel plating solution with cubic system boron nitride (CBN) abrasive grains of #325/400 suspended in it.
- CBN cubic system boron nitride
- a nickel-phosphorus alloy plated bearing layer 16 of average thickness 20 ⁇ m was formed on top it by chemical plating process.
- An electrodeposited grindstone of the present invention thus produced was divided into four parts of which three parts were subjected to a heat treatment by being heated at 150, 250, and 400°C, respectively.
- the hardnesses after heat treatment of the nickel-phosphorus alloy plated layer 14 and the nickel-phosphorus alloy plated bearing layer 16 were both greater than Hv 800. The remaining one part was not heat treated.
- the electrodeposited grindstone which was not given a heat treatment and the electrodeposited grindstones which were given a heat treatment at the respective temperatures were given a grinding test to be compared with an electrodeposited grindstone with an electrodeposited nickel plated bearing layer 15 of average thickness 30 ⁇ m obtained by the conventional method.
- the result of the test showed that the endurance life of the electrodeposited grindstones of the present invention was twice for the specimen which was not heat treated and 2.5 - 3 times for those heat treated specimens, of the corresponding life of the electrodeposited grindstone obtained by the conventional method.
- electrodeposited grindstone in each of the above embodiments of the present invention can be applied as well to other abrasive tools such as shaving cutter in addition to the application to the ordinary abrasive grindstone.
- FIG. 6 shows still another embodiment of the present invention.
- 21 is a grindstone base metal
- 22 is an electrodeposited nickel plated layer
- 23 is a nickel-phosphorus alloy plated layer due to chemical plating process
- 24 is an electrodeposited nickel layer
- 25 is a nickel-phosphorus alloy plated layer due to chemical plating process
- 26 is an abrasive grain.
- the plated layers 22 - 25 are substantially the same as the corresponding layers for the embodiment shown in FIG. 5.
- a thin nickel plated layer of a thickness of about 2 ⁇ m was electrodeposited on the surface of a nickel-phosphorus alloy plated layer.
- This tendency is particularly strong in a layer, with thickness of more than 30 ⁇ m which is obtained by nickel-phosphorus electroless plating, aimed at maintaining uniformity of the electrodeposited layer and improving the accuracy of the grindstone.
- the grindstone is subjected to a heat treatment in the range from 150 to 550°C.
- the topmost electroplated nickel layer retains relative flexibility without being hardened by the heat treatment so that it serves to relax the compressive force and the tensile stress that act on the nickel-phosphorus layer formed by electroless plating.
- FIG. 7 shows a gear type electrodeposited CBN shaving tool 28 which is an example of application of the present invention not to a grindstone but to a tool.
- the electrodeposited grindstone of the present invention prolongs the endurance life to about 1.5 - 3 times that of the conventional electrodeposited grindstone so that the productivity and economy of abrasion and processing work can be improved remarkably by the use of this grindstone.
- the electrodeposited grindstone of the present invention possesses an extremely desirable effect in that there will not be generated cracks or detachments of the electrodeposited layers under severe abrasion conditions, making it possible to cope with severer abrasion conditions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5311787A JPS63221977A (ja) | 1987-03-10 | 1987-03-10 | 電着砥石 |
JP62053118A JPH0822507B2 (ja) | 1987-03-10 | 1987-03-10 | 電着砥石 |
JP53118/87 | 1987-03-10 | ||
JP53117/87 | 1987-03-10 | ||
JP103069/87 | 1987-04-28 | ||
JP10306987A JPS63272466A (ja) | 1987-04-28 | 1987-04-28 | 高強度電着砥石 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0282440A2 EP0282440A2 (en) | 1988-09-14 |
EP0282440A3 EP0282440A3 (en) | 1989-06-14 |
EP0282440B1 true EP0282440B1 (en) | 1993-05-12 |
Family
ID=27294848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88730056A Expired - Lifetime EP0282440B1 (en) | 1987-03-10 | 1988-03-09 | Electrodeposited grindstone |
Country Status (7)
Country | Link |
---|---|
US (1) | US4855019A (es) |
EP (1) | EP0282440B1 (es) |
KR (1) | KR910003131B1 (es) |
CA (1) | CA1325785C (es) |
DE (1) | DE3880862T2 (es) |
ES (1) | ES2040372T3 (es) |
MX (1) | MX169028B (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104070469A (zh) * | 2014-06-19 | 2014-10-01 | 南京航空航天大学 | 一种基于孔模板技术的多种磨料协同排布工艺 |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH684249A5 (de) * | 1991-06-04 | 1994-08-15 | Reishauer Ag | Verfahren zur Herstellung eines formgetreuen Negativformkörpers, Anwendung des Verfahrens sowie damit hergestellte Negativformkörper und Werkzeuge. |
US5352108A (en) * | 1991-10-18 | 1994-10-04 | Norito Sudo | Porous film and porous film manufacturing apparatus |
US5388374A (en) * | 1992-10-09 | 1995-02-14 | United States Surgical Corporation | Apparatus and method for grinding points |
US5571042A (en) * | 1992-10-09 | 1996-11-05 | United States Surgical Corporation | Apparatus for producing hollow ground needles |
US5388373A (en) * | 1992-10-09 | 1995-02-14 | United States Surgical Corporation | Apparatus for applying a cutting edge to a needle |
CH686312A5 (de) * | 1992-11-04 | 1996-02-29 | Rieter Ag Maschf | Spinnring mit Metall-Phosphor-Beschichtung und Ringspinnmaschine. |
DE4335538A1 (de) * | 1992-11-04 | 1994-05-05 | Rieter Ag Maschf | Spinnring mit Verschleiß-Schutzschicht und Einlaufschicht |
US20020178890A1 (en) * | 2001-04-19 | 2002-12-05 | Yukio Okuda | Cutting tool |
DE10148831A1 (de) * | 2001-10-04 | 2003-04-24 | Wacker Chemie Gmbh | Kraftübertragende Oberflächenschicht und Verfahren zu ihrer Herstellung |
KR101237195B1 (ko) * | 2010-11-08 | 2013-03-28 | (주)프로텍이노션 | 휴대폰용 유리의 연삭 가공 방법 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0158825A1 (en) * | 1984-03-20 | 1985-10-23 | General Electric Company | Coated oxidation-resistant porous abrasive compact and method for making same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762882A (en) * | 1971-06-23 | 1973-10-02 | Di Coat Corp | Wear resistant diamond coating and method of application |
US4079552A (en) * | 1974-11-06 | 1978-03-21 | Fletcher J Lawrence | Diamond bonding process |
US4381227A (en) * | 1980-07-31 | 1983-04-26 | Norton Company | Process for the manufacture of abrasive-coated tools |
JPS61274879A (ja) * | 1985-05-30 | 1986-12-05 | Mitsubishi Heavy Ind Ltd | 電着砥石の製造方法 |
-
1988
- 1988-03-05 KR KR1019880002306A patent/KR910003131B1/ko not_active IP Right Cessation
- 1988-03-09 CA CA000560885A patent/CA1325785C/en not_active Expired - Fee Related
- 1988-03-09 EP EP88730056A patent/EP0282440B1/en not_active Expired - Lifetime
- 1988-03-09 DE DE8888730056T patent/DE3880862T2/de not_active Expired - Fee Related
- 1988-03-09 US US07/165,686 patent/US4855019A/en not_active Expired - Fee Related
- 1988-03-09 ES ES198888730056T patent/ES2040372T3/es not_active Expired - Lifetime
- 1988-03-09 MX MX010696A patent/MX169028B/es unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0158825A1 (en) * | 1984-03-20 | 1985-10-23 | General Electric Company | Coated oxidation-resistant porous abrasive compact and method for making same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104070469A (zh) * | 2014-06-19 | 2014-10-01 | 南京航空航天大学 | 一种基于孔模板技术的多种磨料协同排布工艺 |
Also Published As
Publication number | Publication date |
---|---|
DE3880862T2 (de) | 1993-08-26 |
ES2040372T3 (es) | 1993-10-16 |
MX169028B (es) | 1993-06-17 |
KR880010873A (ko) | 1988-10-25 |
DE3880862D1 (de) | 1993-06-17 |
US4855019A (en) | 1989-08-08 |
EP0282440A2 (en) | 1988-09-14 |
CA1325785C (en) | 1994-01-04 |
KR910003131B1 (ko) | 1991-05-20 |
EP0282440A3 (en) | 1989-06-14 |
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